Dry shaver having combination suction and adjustable cutting means



Feb. 25, 1958 A. c. McwlLLlAMs y 2,824,367

DRY SHAVER HAVING COMBINATION SUCTION AND ADJUSTABLE CUTTING MEANS 4 Filed June 22, 1955 2 Sheets-Sheet 1 lNvENToR ARTHUR C. Mc WH-LIAMS ATTORNEYS Feb. 25, 1958 A. c. MCWILLIAMS 2,824,367

' DRY SHAVER HAVING COMBINATION SUCTION AND ADJUSTABLE CUTTING MEANS Filed June 2z, 1955 2 sheets-sheet 2 'ra se 54 55 41 1719 26' PIG. 2

l INVENTQR FIG 9 AKTHUKC. MW|LL|AM5 ATTORN EY5 gether with the vane 67 serve to sweep air out of a plurality of openings 69 in the housing 21.

Means are provided for adjusting the contact pressure between the cutter elements 58. 59 and 61 with the under side of the shear comb 36 seen in Fig. 2, and to this end the hub 46 is bored as at 7l, the coupling member 43 being likewise .bored at 72, the two bores 71 and 72 retaining a spring 73 held therein. The spring 73 urges the cutter 50 against the underside vof the shearing comb 36 in a manner well understood.l

The hub 46 has a recess 74 in the end thereof remote from the shaft 42, and a ball 76 is arranged to seat in the recess 74. screw 77 having a concave seat 75 which is threaded into an internally threaded sleeve 78 molded conczntrically with the inner ange 4l, the adjusting screw 77 having an hexagonal opening 79 therein, to receive an adjusting wrench, not shown. The proper deformation may thus be placed upon the spring 73 to adjust the contact pressure of the cutter elements 58, 59 and 61 fagainst the underside of the shearing comb 36. The adjusting screw 77 may be turned to a position so that in its cooperation with the spring 73 the contact pressure of the cutter elements against the shearing comb may be substantially reduced to Zero, thereby substantially eliminating any friction therebetween causing heat.`

Referring now to Figs. 8 and 9 of the drawings, there is shown another form of a shearing comb referred to generally' by the reference numeral 36a. Such a shear comb may be formed of metal mesh 8l which may be placed in a press to atten the strands 82 making up the mesh 81.` The same may also be constructed to provide a generally annular shape cutter head 36a having an outer rim 37a and an inner rim 39a which can be imbedded by a molding process in the outer ange 38 and the inner flange 41 as with the embodiment seen in Fig. 2.

The dry shaver according to the present invention presents a number of advantages not to be found in the shavers of the prior art. One of the important advantages resides in having the cutter elements travel in different orbital paths so as to minimize the heat between such cutter elements and the shearing head. Another advantage resides in the provision of vanes formed intet grally with the cutter elements thereby to provide suction to insure that the skin is brought into close contact with the shearing head and to bring the hair shafts into position for shearing. The provision of the vane members also enables the cuttings to be dispersed as fast as they are formed, thereby making it unnecessary to clean the shaver after each use. The constant movement of air through the shearing head and past the cutter elements reduces the heat at the cutter head to a minimum.

Another important advantage resides in the provision of the adjusting screw for varying the pressure between the shear comb and the cutter elements for the purpose of minimizing the heat, and also reducing unwanted wear occasioned by too great a contact pressure between the cutter elements and shear comb.

While the drawings illustrate a shearing head having inner and outer anges made of moldable material, it is within the skill of one in the art to construct the shearing head entirely of a suitable metal properly formed.

I claim as my invention:

l. In a dry shaver, a housing, a shearing head secured to said housing and arranged to contact the skin, said shearing head including an annular shaped shearing comb with inner and outer rims secured to inner and outer flanges, a drive shaft extending withinsaidhousing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing head, said cutter elements being displaced radially from each other so as to rotate in different orbits, vane members disposed on said cutterr for creating suction against said shearinghead, openings l i in said housing spaced from said shearing head todisperse The ball 76 cooperates'with `an adjustingcuttings resulting from the action of said cutter elements and said shearing head, resilient means biasing said cutter in a direction toward said shearing comb, and means for adjusting the position of said cutter with respect to said shearing comb.

2. In a dry shaver, a housing, a shearing head secured to said housing and arranged to contact the skin, said shearing head including an annular shaped shearing comb with inner and outer rims embedded in inner and outer flanges, a drive shaft extending within said housing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing head, said cutter elements being displaced radially from each other so as to rotate indifferent orbits, resilient means biasing said cutter 1n a direction toward said shearing comb, and means tor adjusting the position of said cutter with respect to said shearing comb.

3. In a dry shaver, a housing, a shearing head secured to said housing and arranged to contact the skin, said shearing head comprising an annular shaped shearing comb, an outer rim embedding the outer rim of said annular shaped shearing comb, an inner rim embedding the inner rim of said annular shaped shearing como, a drive shaft extending within said housing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing comb, said cutter elements being displaced radially from each other so as to rotate in difierent orbits, means driven by said shaft tor creating suction against said shearing head, and means supported by said inner rim for adjusting the position of said cutter elements with respect to said shearing comb.

4. In a dry shaver, a housing, a shearing head secured to said housing and arranged to contact the skin, said shearing head comprising an annular shaped shearing comb, an outer rim embedding the outer rim of said annular shaped shearing comb, and an inner rim embedding the inner rim of said annular shaped shearing comb, a drive shaft extending within said housing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing head, means driven by said shaft for creating suction against said shearing head, and means for adjusting the position of said cutter elements with respect to said shearing comb comprising a splined connection between said shaft and said cutter, a spring acting between vsaid shaft and said cutter, and an adjusting member threadably held in said inner rim and bearing against said cutter.

S. Ina dry shaver, a housing, a shearing head secured to said housing and having a shearing comb arranged to contact the skin, a drive shaft extending within said housing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing head, said cutter elements being displaced radially from each other so as to rotate in different orbits, means driven by said shaft for creating suction against said shearing head, openingsin said housing spaced from said shearing head to disperse cuttings resulting from the action of said cutter elements and said shearing head, and means sup ported on said shearing head for adjusting the position of said cutter elements with respect to said shearing comb.

6. In a dry shaver, a housing, a thin perforated shearing head secured to said.v housing and arranged to contact the skin, a drive shaft extending within said housing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing head, said cutter elements being displaced radially from each other so as to rotate indifferent orbits, vane members disposed on said cutter for creating suction against said shearing head, ar td openings in said housing spaced from said shearing head, to

disperse cuttings resulting from the action of said cutter elements and said shearing head, and means for adjusting the position of said cutter elements with respect to said shearing head.

7. In a dry shaver, a housing, a thin perforated shearing head secured to said housing and arranged to contact the skin, a drive shaft extending within said housing, a cutter mounted on said shaft for rotation therewith, said cutter having cutter elements mounted thereon and cooperating with said shearing head, said cutter elements being displaced radially from each other so as to rotate in different orbits, means driven by said shaft for creating suction against said shearing head, and means for adjusting the position of said cutter elements with respect to said shearing head.

References Cited in the tile of this patent UNITED STATES PATENTS 

